Safety lock



Nov. 13, 1928.

s. J. sTRlD SAFETY LOCK Filed Sept. 10. 1926 Patented lflov. l, i928.

nai-reo sra res Per-rar erta-3 are SVEN J. STR-in, or fcHIcaGo, rnitirios,v As'sfenon, Brr lyrnsrinassrerimnrira .T5

E. Payson sivrrrrr, on onroeeo, rLLrnors.

sanary Locri.

Application led September 10, 1926, Serial No. 134,618.

My invention relates to al pin lock particularly adapted for holding a pin in place on railway car brake mechanism.

It is the principal object of the invention to provide an improved, simple, reliable and cheap form of lock for preventing the accidental withdrawal ot' a pin. Y

In the drawings which show, for illustrative purposes only, a preferred formof the invention- Fig. l is a` fragmentary view of railway car brake mechanism illustrating the iniproved form of pin lock in section;

Fig. 2 is a view similar to Fig. 1 but viewed at right angles thereto; i

Fig. 3 is an enlarged perspective view of the pin lock shown in Figs. l and 2.

In said drawings, 5-6 indicate two membersof railway car brake mechanism, pivotally connected together by means cfa pin 7, preferably having a head 8 at one end. My improved pin lock is adapted to secure the pin 7 in place so as to prevent accidental falling out of the pin with consequent disastrous results to the brake mechanism.

In thevpreferred form, the pin lock comprises a sheet metal member bent into substantially U-form, thus providing legs 9-l0. If desired, the member may have a rib 11 at the bend of the U for strengthening the member and preventing the legs of relatively thin sheet metal from spreading. The leg 9, if desired, may be of substantially the same length as the leg l0, and it so is provided with an opening l2 of a size to receive the shank of the pin 7. VThe leg 10 has one or Vmore bendable tonguesv 13-14 thereon and,

in the preferred form, these tongues areA formed by slitting the leg l0 longitudinally and striking up the metal' between the slits,

so as to form the two opposed bendabl'e tongues integral with the leg.

The webs or connecting portions at the sides of the slits are preferably corrugated i diagonally and at oppositely inclined angles relatively vto a lmedian line, indicated at y15-15, and the corrugations preferably eX- tend substantially up to thefree end of the leg l0, as indicated at 16'-16. rI`he slot or opening formed by slitting the metal and striking up the tongue or tongues is preferably of'a size to receive thepin head 8, and by making the slot relatively long, correspondingly long tongues 13---14- will be provided. The diagonal corrugations serve to tially up to the end of the leg shorten the webs and bring the tongues 13 14 closer together thus,` in eect, providing long'er tongues to be bent down over thepin head 8, as clearly shown in Figs. land 2. Tithout the stifening corrugations the metal forming the relatively narrow webs would tend to bend so as to curl up or raise the extreme end of the leg lO when the tongue 13 is hammered or bent down over the pinv head 8. The corrugations extending substanlO, that is, outwardly beyond base of the tongue 13, effectively prevent bending of the webs when the tongue lis bent down. The corrugations have an added advantage in thatthe pin head Sabuts against the edges of the corrugations, and the metal constituting the webs is thus prevented from slipping beneath the head 8 and thus displacing the pin lock sidewise. y' y The pin lock may be applied as follows:

The U-shaped member, with the tonguesezitending as shown in Fig. 3, is slipped over the fork arm 5 and the pin Tthen passed through the slot in the leg 10 and through the aperture 12 (when the leg9 is sulticiently long and such aperture is provided). The upstanding tongues 13h14- may then be bent down into the Y and 2. .The pin 7 is thus elfectually prevented.l from accidentally working loose. Should one of the tongues be broken olf or be accidentally bent up, the other tongue may still serve to hold the pin in place. i

Vhile the invention has been desoribed'in detail, I do not wish'to be strictly limited to the form shown, since ch anges may be made within the scope of the invention as the appended claims.

I claim: Y

l. A pin lock including a sheet metal mem-y position shown in Figs. l i' delinedin ber of substantially U-form, Vone leg 'of the v defining said` slot and lying betweenv said tongues having diagonally extending corrugations therein 'extending substantiallyy past said tongue at the end of the leg of said U.

2. A pin lock comprising a sheet metal member having a slot therein and the metal within said. slot struck up to form an integral b'endable tongue, the metal defining said slot at op osite sides being corrugated diagsaid bendable tongues, the metal adjacent the l onally to oreshorten said member and stifen sides of said opening and betweenl said the side Walls against longitudinal bending. `tongues Vbeing corrugated, and the corru- 11 3.` A pin lock comprising va sheet metal gat-ions extending `diagonally, to Vforeshorten 5 member having two bendable tonguesl therethe sides of said member.

on adjacent the ends of said member, and v having an opening inwardly of and adjacent S. J. STRID. 

